Java 从数据库中填充JTable
我编写这个简单的代码是为了填充Java 从数据库中填充JTable,java,sql,database,jtable,type-2-dimension,Java,Sql,Database,Jtable,Type 2 Dimension,我编写这个简单的代码是为了填充jTable1,但它只是用数据库中的最后一行填充jTable1 String SQL = "select * from usernames"; ResultSet rs = stmt.executeQuery(SQL); String[] columnNames = {"Full Name", "Email"}; String n = "",e = ""; while(rs.next()) { n = rs.getString("Full_Name");
jTable1
,但它只是用数据库中的最后一行填充jTable1
String SQL = "select * from usernames";
ResultSet rs = stmt.executeQuery(SQL);
String[] columnNames = {"Full Name", "Email"};
String n = "",e = "";
while(rs.next()) {
n = rs.getString("Full_Name");
e = rs.getString("Email");
Object[][]data = {{n,e}};
jTable1 = new JTable(data, columnNames);
}
是的,它将始终是最后一行,因为在while循环中,您正在创建一个新的JTable,而不是在现有JTable上追加一行。所以你要像这样,
// Code
DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
while(rs.next())
{
n = rs.getString("Full_Name");
e= rs.getString("Email");
//Object[][]data={{n,e}};
// This will add row from the DB as the last row in the JTable.
model.insertRow(jtable1.getRowCount(), new Object[] {n, e});
}
是的,它将始终是最后一行,因为在while循环中,您正在创建一个新的JTable,而不是在现有JTable上追加一行。所以你要像这样,
// Code
DefaultTableModel model = (DefaultTableModel) jTable1.getModel();
while(rs.next())
{
n = rs.getString("Full_Name");
e= rs.getString("Email");
//Object[][]data={{n,e}};
// This will add row from the DB as the last row in the JTable.
model.insertRow(jtable1.getRowCount(), new Object[] {n, e});
}
我用这个密码解决了它
String n = "",e = "";
DefaultTableModel model;
model = new DefaultTableModel();
jTable1 = new JTable(model);
model.addColumn("Full Name");
model.addColumn("Email");
while(rs.next())
{
n = rs.getString("Full_Name");
e= rs.getString("Email");
model.addRow(new Object[]{n,e});
}
我用这个密码解决了它
String n = "",e = "";
DefaultTableModel model;
model = new DefaultTableModel();
jTable1 = new JTable(model);
model.addColumn("Full Name");
model.addColumn("Email");
while(rs.next())
{
n = rs.getString("Full_Name");
e= rs.getString("Email");
model.addRow(new Object[]{n,e});
}
我可以在这一行进行更改吗在不每次创建新JTable的情况下向jTable1添加项目。但我无法动态添加它,可能是您可以创建一个空行,然后使用setValueAt(..)方法添加。但我仍然不确定这一点。使用模型您可以轻松处理差异函数,如添加、删除、更新。我可以在这一行进行更改吗在不每次创建新JTable的情况下向jTable1添加项目。但我无法动态添加它,可能是您可以创建一个空行,然后使用setValueAt(..)方法添加。但我仍然不确定这一点。使用模型,您可以轻松处理差异功能,如添加、删除、更新。